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/*
===========================================================================
Copyright (C) 1999-2005 Id Software, Inc.
Copyright (C) 2000-2006 Tim Angus
This file is part of Tremulous.
Tremulous is free software; you can redistribute it
and/or modify it under the terms of the GNU General Public License as
published by the Free Software Foundation; either version 2 of the License,
or (at your option) any later version.
Tremulous is distributed in the hope that it will be
useful, but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with Tremulous; if not, write to the Free Software
Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
===========================================================================
*/
/*****************************************************************************
* name: l_script.h
*
* desc: lexicographical parser
*
* $Archive: /source/code/botlib/l_script.h $
*
*****************************************************************************/
//undef if binary numbers of the form 0b... or 0B... are not allowed
#define BINARYNUMBERS
//undef if not using the token.intvalue and token.floatvalue
#define NUMBERVALUE
//use dollar sign also as punctuation
#define DOLLAR
//maximum token length
#define MAX_TOKEN 1024
#if defined(BSPC) && !defined(QDECL)
#define QDECL
#endif
//script flags
#define SCFL_NOERRORS 0x0001
#define SCFL_NOWARNINGS 0x0002
#define SCFL_NOSTRINGWHITESPACES 0x0004
#define SCFL_NOSTRINGESCAPECHARS 0x0008
#define SCFL_PRIMITIVE 0x0010
#define SCFL_NOBINARYNUMBERS 0x0020
#define SCFL_NONUMBERVALUES 0x0040
//token types
#define TT_STRING 1 // string
#define TT_LITERAL 2 // literal
#define TT_NUMBER 3 // number
#define TT_NAME 4 // name
#define TT_PUNCTUATION 5 // punctuation
//string sub type
//---------------
// the length of the string
//literal sub type
//----------------
// the ASCII code of the literal
//number sub type
//---------------
#define TT_DECIMAL 0x0008 // decimal number
#define TT_HEX 0x0100 // hexadecimal number
#define TT_OCTAL 0x0200 // octal number
#ifdef BINARYNUMBERS
#define TT_BINARY 0x0400 // binary number
#endif //BINARYNUMBERS
#define TT_FLOAT 0x0800 // floating point number
#define TT_INTEGER 0x1000 // integer number
#define TT_LONG 0x2000 // long number
#define TT_UNSIGNED 0x4000 // unsigned number
//punctuation sub type
//--------------------
#define P_RSHIFT_ASSIGN 1
#define P_LSHIFT_ASSIGN 2
#define P_PARMS 3
#define P_PRECOMPMERGE 4
#define P_LOGIC_AND 5
#define P_LOGIC_OR 6
#define P_LOGIC_GEQ 7
#define P_LOGIC_LEQ 8
#define P_LOGIC_EQ 9
#define P_LOGIC_UNEQ 10
#define P_MUL_ASSIGN 11
#define P_DIV_ASSIGN 12
#define P_MOD_ASSIGN 13
#define P_ADD_ASSIGN 14
#define P_SUB_ASSIGN 15
#define P_INC 16
#define P_DEC 17
#define P_BIN_AND_ASSIGN 18
#define P_BIN_OR_ASSIGN 19
#define P_BIN_XOR_ASSIGN 20
#define P_RSHIFT 21
#define P_LSHIFT 22
#define P_POINTERREF 23
#define P_CPP1 24
#define P_CPP2 25
#define P_MUL 26
#define P_DIV 27
#define P_MOD 28
#define P_ADD 29
#define P_SUB 30
#define P_ASSIGN 31
#define P_BIN_AND 32
#define P_BIN_OR 33
#define P_BIN_XOR 34
#define P_BIN_NOT 35
#define P_LOGIC_NOT 36
#define P_LOGIC_GREATER 37
#define P_LOGIC_LESS 38
#define P_REF 39
#define P_COMMA 40
#define P_SEMICOLON 41
#define P_COLON 42
#define P_QUESTIONMARK 43
#define P_PARENTHESESOPEN 44
#define P_PARENTHESESCLOSE 45
#define P_BRACEOPEN 46
#define P_BRACECLOSE 47
#define P_SQBRACKETOPEN 48
#define P_SQBRACKETCLOSE 49
#define P_BACKSLASH 50
#define P_PRECOMP 51
#define P_DOLLAR 52
//name sub type
//-------------
// the length of the name
//punctuation
typedef struct punctuation_s
{
char *p; //punctuation character(s)
int n; //punctuation indication
struct punctuation_s *next; //next punctuation
} punctuation_t;
//token
typedef struct token_s
{
char string[MAX_TOKEN]; //available token
int type; //last read token type
int subtype; //last read token sub type
#ifdef NUMBERVALUE
unsigned long int intvalue; //integer value
double floatvalue; //floating point value
#endif //NUMBERVALUE
char *whitespace_p; //start of white space before token
char *endwhitespace_p; //start of white space before token
int line; //line the token was on
int linescrossed; //lines crossed in white space
struct token_s *next; //next token in chain
} token_t;
//script file
typedef struct script_s
{
char filename[1024]; //file name of the script
char *buffer; //buffer containing the script
char *script_p; //current pointer in the script
char *end_p; //pointer to the end of the script
char *lastscript_p; //script pointer before reading token
char *whitespace_p; //begin of the white space
char *endwhitespace_p; //end of the white space
int length; //length of the script in bytes
int line; //current line in script
int lastline; //line before reading token
int tokenavailable; //set by UnreadLastToken
int flags; //several script flags
punctuation_t *punctuations; //the punctuations used in the script
punctuation_t **punctuationtable;
token_t token; //available token
struct script_s *next; //next script in a chain
} script_t;
//read a token from the script
int PS_ReadToken(script_t *script, token_t *token);
//expect a certain token
int PS_ExpectTokenString(script_t *script, char *string);
//expect a certain token type
int PS_ExpectTokenType(script_t *script, int type, int subtype, token_t *token);
//expect a token
int PS_ExpectAnyToken(script_t *script, token_t *token);
//returns true when the token is available
int PS_CheckTokenString(script_t *script, char *string);
//returns true an reads the token when a token with the given type is available
int PS_CheckTokenType(script_t *script, int type, int subtype, token_t *token);
//skip tokens until the given token string is read
int PS_SkipUntilString(script_t *script, char *string);
//unread the last token read from the script
void PS_UnreadLastToken(script_t *script);
//unread the given token
void PS_UnreadToken(script_t *script, token_t *token);
//returns the next character of the read white space, returns NULL if none
char PS_NextWhiteSpaceChar(script_t *script);
//remove any leading and trailing double quotes from the token
void StripDoubleQuotes(char *string);
//remove any leading and trailing single quotes from the token
void StripSingleQuotes(char *string);
//read a possible signed integer
signed long int ReadSignedInt(script_t *script);
//read a possible signed floating point number
double ReadSignedFloat(script_t *script);
//set an array with punctuations, NULL restores default C/C++ set
void SetScriptPunctuations(script_t *script, punctuation_t *p);
//set script flags
void SetScriptFlags(script_t *script, int flags);
//get script flags
int GetScriptFlags(script_t *script);
//reset a script
void ResetScript(script_t *script);
//returns true if at the end of the script
int EndOfScript(script_t *script);
//returns a pointer to the punctuation with the given number
char *PunctuationFromNum(script_t *script, int num);
//load a script from the given file at the given offset with the given length
script_t *LoadScriptFile(const char *filename);
//load a script from the given memory with the given length
script_t *LoadScriptMemory(char *ptr, int length, char *name);
//free a script
void FreeScript(script_t *script);
//set the base folder to load files from
void PS_SetBaseFolder(char *path);
//print a script error with filename and line number
void QDECL ScriptError(script_t *script, char *str, ...);
//print a script warning with filename and line number
void QDECL ScriptWarning(script_t *script, char *str, ...);
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